∵-|-23|=-23=-812,-34=-912,
∴-|-23|>-34.
分子式为C16H28的链状烃,其分子中只含有C=C双键,而无其它不饱和键,类比乙烯和乙烷 的关系,推测该烃中含有C=C双键的数目是
A.1个
B.2个
C.3个
D.4个
—I think I'll give Bob a ring.
—You ______. You haven't been in touch with him for ages.
A.will
B.may
C.have to
D.should